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From 70a27ae9f2b45d6dba56ee4240b6adf79c544ee1 Mon Sep 17 00:00:00 2001
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From: Lianbo Jiang <lijiang@redhat.com>
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Date: Thu, 6 Jan 2022 22:34:26 +0800
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Subject: [PATCH 01/10] Fix for "timer -r" option to display all the per-CPU
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clocks
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Currently, the hrtimer_max_clock_bases is hard-coded to 3, which
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makes that crash only prints three clocks, and the rest of clocks
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are not displayed.
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Without the patch:
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crash> timer -r -C 11
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CPU: 11 HRTIMER_CPU_BASE: ffff9a775f95ee00
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CLOCK: 0 HRTIMER_CLOCK_BASE: ffff9a775f95ee80 [ktime_get]
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(empty)
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CLOCK: 1 HRTIMER_CLOCK_BASE: ffff9a775f95ef00 [ktime_get_real]
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(empty)
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CLOCK: 2 HRTIMER_CLOCK_BASE: ffff9a775f95ef80 [ktime_get_boottime]
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(empty)
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With the patch:
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crash> timer -r -C 11
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CPU: 11 HRTIMER_CPU_BASE: ffff9a775f95ee00
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CLOCK: 0 HRTIMER_CLOCK_BASE: ffff9a775f95ee80 [ktime_get]
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(empty)
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CLOCK: 1 HRTIMER_CLOCK_BASE: ffff9a775f95ef00 [ktime_get_real]
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(empty)
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CLOCK: 2 HRTIMER_CLOCK_BASE: ffff9a775f95ef80 [ktime_get_boottime]
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(empty)
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...
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CLOCK: 7 HRTIMER_CLOCK_BASE: ffff9a775f95f200 [ktime_get_clocktai]
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(empty)
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Signed-off-by: Lianbo Jiang <lijiang@redhat.com>
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---
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kernel.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/kernel.c b/kernel.c
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index 37b7af74ed2e..36c57ed501ad 100644
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--- a/kernel.c
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+++ b/kernel.c
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@@ -7675,7 +7675,8 @@ dump_hrtimer_data(const ulong *cpus)
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if (VALID_STRUCT(hrtimer_clock_base)) {
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hrtimer_max_clock_bases = 2;
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if (symbol_exists("ktime_get_boottime"))
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- hrtimer_max_clock_bases = 3;
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+ hrtimer_max_clock_bases = MEMBER_SIZE("hrtimer_cpu_base", "clock_base") /
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+ SIZE(hrtimer_clock_base);
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} else if (VALID_STRUCT(hrtimer_base)) {
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max_hrtimer_bases = 2;
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} else
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--
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2.20.1
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